1. Emergency phone users can directly communicate with operators at the emergency call console, using push-to-talk (easy to operate).

2. Upon pressing the extension button, the extension automatically initiates a call to the monitoring center's main console, transmitting basic information such as the local mileage marker and up/downlink direction.

3. Each emergency call is assigned a unique address code for upload to the control center, to determine call location, receive calls, and detect.

4. The console operator should be able to establish full-duplex communication promptly after answering.

5. The console can communicate simultaneously with any two emergency telephone extension lines.

6. Capable of receiving detection commands from the console host, promptly checking the branch stations, and sending the detection results back to the console host.

7. Failure or damage to any one or more I-line emergency phones should not affect communication between other emergency phones and the control console.

8. The extension can automatically emit voice prompts during calls, reporting the system's operational status.

9. Capable of accepting various calls from the console host and automatically releasing the circuit after the console is on hold.

10. Clear and loud voice during calls, free of feedback howling.

11. The extension line has implemented various lightning protection measures, yielding excellent lightning resistance.

12. Broadcast Amplifier Communication - Optional on/off for the broadcast amplifier, and audio signals can be output to the broadcast amplifier.

13. The branch office is equipped with high-intensity imported reflective film luminous signs in both the receiving and sending vehicle directions, with the sign patterns and colors meeting national standards.

14. This system's main circuitry employs a "hot standby" design structure, with the primary circuit operating normally and the backup circuit automatically taking over in the event of a primary circuit fault. Utilizing the backup circuit, the system can

We offer 2 consecutive channels, ensuring that the console can communicate with 2 different roadside subunits at the same time. The system is equipped with lightning protection, and all incoming and outgoing lines of the host, subunit system, and each audio amplification load area must be connected to lightning protection terminals to prevent cable surge caused by lightning induction from damaging the host, subunits, and amplifiers.

16. This system is set with over/under voltage protection. After the device is turned on, it should automatically monitor the voltage. If the battery is low or the voltage is insufficient, an alarm will be triggered on the computer at the monitoring center immediately.